Core-spacing member for dynamo-electric machines.



B. A. BEHREND.

CORE SPACING MEMBER FOR DYNAMC ELECTRIC MACHINES.

APPLICATION FILED AUG. a1. 1906.

925,271 Patented June 15, 1909.

UNITED STATES PATENT OFFICE.

BERNARD A. BEIIREND, OF h ORl/YOOD, OHIO, ASSIG NOR TO ALLIS-(TIIAIMERS COMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING COM- PANY, A CORPORATION OF OHIO,

CORE-SFACING MEMBER FOR DYNAMO-ELECTBI'C MACHINES.

No 925,271. Specification of Letters Patent. Patented June 15, 1909. Application filed August 31, 1906. Serial No. 332,773.

To all whom itma'y concern: core, spacing plate. Fig. is a plan view lie it known that I, BERNARD A. BEIIRENI), of a portion of a core showing a spacing citizen of the United States, residing at member formed by plates having the con Korwood, in the county of Hamilton and struction shown in Fig. l. Fig. 6 is a por- 5 State of Ohio, have invented certain new tion of a section of the core showing the two and useful Improvements in CoreSpacing plates of-the typeshown in Fig. l and showlcz'embers for Dynamo-Electric Machines, of ing the staggered or interlockingrelation of which the following is a full, clear, and the spacing projections. exact specification. Referring now to the figures of the draw- 10 This invention relates to improvements in ing, 10 represents the shaft of the rotary dynamo-electric machines and particularly 'member of a dynamo-electric machine, said to spacing and ventilating members for shaft having mounted thereon a spider ll laminated cores of such machines. and a core 12 built up of laminae which may The object of the invention the probe secured to the spider in any desired man- 15 vision of core spacing members which can ner. preferably by dove-tail connections, and be easily and cheaply manufactured, which which are clamped between end heads or are strong mechanically and which will per-' members l3 at the ends of the spider. The niit an ample ventilation or circulation'of lamina arearranged in groops which are air regardless of the size of the core. spaced apart by my'improved spacing mem- 20. In carrying out my invention, I employ bers sons to form ventilating spaces at interfor each spacing member, instead of a single vals in the body of the core, which spaces plate orcastinghaving all the spacing ribs or communicate with transverse ventilating projections, two oppositely disposed plates, spaces or passageways 14. each carrying part of the spacing projec- The spacing members constructed and ar- 25 tions, the projections of one plate bearing ranged in accordance with my invention,

on the other plate intermediate the projeceach comprise a pair of oppositely disposed tions of that plate. \Vith this arrangement plates which in Figs. 1, 2, and 3 are desigand construction, the angular spacing or nated l9, said plates having plain or smooth distance between the adjacent projections faces which abut against the end laminze of 30 *arried by each plate is twice as great as in the adjacent groups and on the adjacent the ordinary constructions wherein single faceshaving spacing and ventilating proplates are employed. 1 jections, which, in the form of my invention v 'Myyinvention may be further briefly sum shown in Figs. 1, 2, and 3, consist of radial mariad as consisting in certain novel details ribs 20. In the present ase, by way of ex- 35 of construction, and combinations and arample,. I have shown plates segmental .in rangements of parts which will be described shape but it will be apparent that whether in the Specification and. set forth in the apthe plates are of the integral or segmental pended claims. type is immaterial to my invention. Each For a better understanding. of my invenplate is proyided with peripheral teeth 19 40 tion, reference is had to the accompanying which are equal in number to the number of drawings in whicl1 core teeth and register with the latter and 'l igure 1 is a partial longitudinal section the ribs 20 of each plate are located. in line of an' armature core havings acing and venwith alternate teeth and have, therefore, tilating members constructed and arranged twice the angular spacing'that they would 45 in accordance with one form. of my-invenhave if arranged in line with all the teeth as tion. Fig. 2 is a. front elevation of one of in the-usual constructions. \Vhen the lamthe core spacing plates employed in the coninae and plates 19 are assembled, theplates struction shown 1n Fig.' 1. Fig. '3 is a plan are 50' arranged that the ribs 20 of each view of a portion of the core showing the plate beanon the opposite plate intermediate 50 arrangement of the two. cooperating plates the ribs of that plate, with the result that of one-spacing member and showing the the ribs are staggered or pro ect alternately staggered relation of the spacing ribs. Fig. from opposite plates. -The length of the it is a front elevation of a modified form of spacing ribs may, of course, be varied, but

in the present case they extend from the inner edge of the plate nearly to the bases of the peripheral teeth and while they do not brace the core teeth, this construction is preferred in some cases particularly in small cores for the rea'son'that a' better circulation of air can take place between the condh'ctors (not shown) in the core slots, than would result if the ribs extended. outward along. the core teeth. It will be understood that when the ribs have substantially the len th here shown the plates 19 will be of suc a. thickness and material that the pe ripheral teeth l9 will have suflicient rigidity to support and brace the core teeth.

In the modification shown in Figs. 4, 5, and 6, each plate 21 is provided with spacing lugs or projections 22 which bear upon the oppositepla-te'. In this case in line with each alternate tooth is a row of three projections which are spaced apart in a radial direction and in line .with each of the rement is reversed so thatwhen the plates are assembled, projections of each plate bear upon the opposite plate in the spaces between the projections of the latter plate, as is shown 0 early in Fig. 6. Of course, is to be understood that the number of projections and their order or arrangement may be varied from the number and arrangement shown in these figures. It will be seen that in this construction the teeth as well as the body of the laminae are braced, the construction bein therefore atrifle stronger mechanically, ut permitting a slightly less extensive circulation of air. than in the construction first described. Y

While I have shown in Figs. 2 and 4 core spacing plates segmental in shape it will be understood that between adjacent groups of laminae, a sufiicient number of these segments will be arranged end to end so as to sitely disposed sections, each spacin extend entirely around the shaft or otherwise conform to the shape of the core.

I do, not desire to be confined to the exact details shown but aim in my claims to cover all modifications which'do not involve a de-' parture from the spirit and scope of my invention.

'VVhat I claim as new-and desire to secure by Letters Patent is':-

. 1. In a dynamo-electric machine, a laminated core, spacing members between the lamina: dividing the latter into sections, each spacing member comprising a pair of toothed 2. In a dynamo-electric machine, a laminated core, spacing members between the laminae dividing the core into sections, each of said spacing members comprising oppolates each having on one side a plane sur ace bearing against the end laminae ot-a section and on the other side radial ribs which bear on the plate ofthe V next adjacent section, the ribs of one plate bearing against the adjacent plate intermediate the ribs of that plate.

3. In a dynamo-electric machine, a laminated core, s acing members between the laminae dividing the latter into groups or member comprising a pair of oppositely isposed toothed plates of greater thickness than the lamina each plate havin ri-bs which project axially of the corean bear on the opposite plate, said ribs being staggered so that the ribs of one plate' occur between the ribs of the other plate.

In testimonywhereof I afiix my signature, in the presence of two witnesses.

BERNARD A. BEHREND.

Witnesses:

LAURA E. WEBB, LAURA E. WELOH. 

